單項(xiàng)選擇題

My ship’s engine responds well to telegraph orders and takes about 80 seconds to reverse from full speed ahead to full speed astern.This sentence（）.

A.indicates the engine's particulars
B.tells the engine's function
C.shows the engine's type
D.refers to the engine's information

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單項(xiàng)選擇題

Most medium and slow speed diesels are started by what medium?（）

A.Electric starting motors
B.Hydraulics
C.Compressed air
D.Ether

單項(xiàng)選擇題

Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.

A.may jam against the stops
B.will not automatically position the boat at the embarkation station
C.screw may come out of the sheath
D.will chafe against the falls and may cause their failure

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My ship’s engine responds well to telegraph orders and takes about 80 seconds to reverse from full speed ahead to full speed astern.This sentence（）.

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Most medium and slow speed diesels are started by what medium?（）

Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.